package com.coding.springboot.demo.util;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import com.coding.springboot.demo.entity.AccessToken;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;

import org.apache.commons.lang.StringUtils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;



/**
 * 公众平台通用接口工具类
 */
public class WeixinUtil {
	private static Logger log = LoggerFactory.getLogger(WeixinUtil.class);

	/**
	 * 发起https请求并获取结果
	 *
	 * @param requestUrl 请求地址
	 * @param requestMethod 请求方式（GET、POST）
	 * @param outputStr 提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			jsonObject = JSONObject.fromObject(buffer.toString());
		} catch (ConnectException ce) {
			log.error("Weixin server connection timed out.");
		} catch (Exception e) {
			log.error("https request error:{}", e);
		}
		return jsonObject;
	}


	// 获取access_token的接口地址（GET） 限200（次/天）
	public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	/**
	 * 获取access_token
	 *
	 * @param appid 凭证
	 * @param appsecret 密钥
	 * @return
	 */
	public static AccessToken getAccessToken(String appid, String appsecret) {
		AccessToken accessToken = null;

		String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
			try {
				accessToken = new AccessToken();
				accessToken.setToken(jsonObject.getString("access_token"));
				accessToken.setExpiresIn(jsonObject.getInt("expires_in"));
			} catch (JSONException e) {
				accessToken = null;
				// 获取token失败
				log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
			}
		}
		return accessToken;
	}

	/**
	 * 网页授权token 通过code获取token
	 *
	 **/
	private static String token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
	public static JSONObject getToken(String appid,String secret,String code){
		String url = token_url.replace("CODE", code);
		url = url.replace("APPID", appid);
		url = url.replace("SECRET", secret);
		JSONObject jsonObject = httpRequest(url, "POST", null);
		return jsonObject;
	}

	/**
	 * 网页授权获取用户的基本信息
	 * @param accessToken
	 * @param openid
	 * @return
	 */

	private static String userinfo_url = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID";
	public  static JSONObject getUserInfo(String accessToken,String openid){
		String url = userinfo_url.replace("ACCESS_TOKEN", accessToken);
		url = url.replace("OPENID", openid);
		JSONObject jsonObject = httpRequest(url, "GET", null);
		return jsonObject;
	}

	/**
	 * 获得jsapi_ticket
	 * @param accessToken
	 * @return
	 */

	private static String jsapi_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";
	public  static JSONObject getJsapiUrl(String accessToken){
		String url = jsapi_url.replace("ACCESS_TOKEN", accessToken);
		JSONObject jsonObject = httpRequest(url, "GET", null);
		return jsonObject;
	}
}